exports.index = async function () {
  await this.bindDefault();

  /**
   * 其实你还可以这么写proxy:
	  await this.proxy({
	  	repoInfo: 'github:repos/xiongwilee/koa-grace'
	  })
   * 然后在 this.backData.repoInfo 中就可以拿到返回参数
   */
  await this.proxy({
    news: 'pf:news'
  })

  await this.render('home', this.backData);
}